With ATHelp.org, Mark has offered free AT support to over 4300 children and adults with communication, vision, learning and physical challenges. He has also provided services as an Assistive Technology Consultant to public, private and charter schools and has trained professionals in a wealth of educational institutions and associations.

Mark has long been a fan of Clicker, which has been built on the principles of Universal Design for Learning - we caught up with him recently to find out how Clicker benefits the students and educators that he works with, and its important role in facilitating a universally designed curriculum.